/* ==========================================================================
   Design System & Global Variables
   ========================================================================== */
:root {
  --font-family: 'Plus Jakarta Sans', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  
  /* Palette de couleurs */
  --bg-dark: #090d16;
  --card-bg: rgba(18, 26, 43, 0.75);
  --card-border: rgba(255, 255, 255, 0.08);
  --card-border-hover: rgba(99, 102, 241, 0.4);
  
  --primary: #6366f1;
  --primary-hover: #4f46e5;
  --primary-glow: rgba(99, 102, 241, 0.35);
  
  --accent: #a855f7;
  --accent-secondary: #ec4899;
  
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --text-dim: #64748b;
  
  --success: #10b981;
  --danger: #ef4444;
  --danger-hover: #dc2626;
  
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  
  --transition-fast: 0.15s ease;
  --transition-normal: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ==========================================================================
   Reset & Base Styles
   ========================================================================== */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-family);
  background-color: var(--bg-dark);
  color: var(--text-main);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: space-between;
  overflow-x: hidden;
  position: relative;
}

/* Fond animé avec des blobs */
.background-blobs {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: -1;
  overflow: hidden;
  pointer-events: none;
}

.blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(100px);
  opacity: 0.25;
  animation: blobFloat 18s infinite alternate ease-in-out;
}

.blob-1 {
  width: 500px;
  height: 500px;
  background: var(--primary);
  top: -150px;
  left: -100px;
}

.blob-2 {
  width: 600px;
  height: 600px;
  background: var(--accent-secondary);
  bottom: -200px;
  right: -150px;
  animation-delay: -9s;
}

@keyframes blobFloat {
  0% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(60px, 40px) scale(1.1); }
  100% { transform: translate(-40px, 80px) scale(0.95); }
}

/* ==========================================================================
   Layout & Container
   ========================================================================== */
.container {
  width: 100%;
  max-width: 980px;
  padding: 2.5rem 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

/* Header */
.app-header {
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
}

.logo-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.4rem 0.9rem;
  background: rgba(99, 102, 241, 0.12);
  border: 1px solid rgba(99, 102, 241, 0.3);
  border-radius: 50px;
  font-size: 0.825rem;
  font-weight: 600;
  color: #a5b4fc;
}

.logo-badge svg {
  color: var(--primary);
}

h1 {
  font-size: 2.5rem;
  font-weight: 700;
  letter-spacing: -0.03em;
}

.gradient-text {
  background: linear-gradient(135deg, #a855f7 0%, #ec4899 50%, #f43f5e 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.subtitle {
  color: var(--text-muted);
  font-size: 1.05rem;
  max-width: 600px;
  line-height: 1.5;
}

/* ==========================================================================
   Drop Zone
   ========================================================================== */
.drop-section {
  width: 100%;
}

.drop-zone {
  position: relative;
  background: var(--card-bg);
  backdrop-filter: blur(16px);
  border: 2px dashed rgba(99, 102, 241, 0.35);
  border-radius: var(--radius-lg);
  padding: 3.5rem 2rem;
  text-align: center;
  cursor: pointer;
  transition: var(--transition-normal);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

.drop-zone:hover, .drop-zone.dragover {
  border-color: var(--primary);
  background: rgba(30, 41, 69, 0.85);
  box-shadow: 0 0 35px var(--primary-glow);
  transform: translateY(-2px);
}

.drop-zone.dragover {
  border-style: solid;
  scale: 1.01;
}

.file-input {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  cursor: pointer;
}

.drop-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
  pointer-events: none;
}

.drop-icon {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.2), rgba(168, 85, 247, 0.2));
  display: flex;
  align-items: center;
  justify-content: center;
  color: #a5b4fc;
  margin-bottom: 0.25rem;
  transition: var(--transition-normal);
}

.drop-zone:hover .drop-icon {
  transform: scale(1.1) rotate(-5deg);
  color: #fff;
}

.drop-content h3 {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-main);
}

.browse-btn {
  color: #818cf8;
  font-weight: 600;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.file-types-info {
  font-size: 0.85rem;
  color: var(--text-dim);
  margin-top: 0.25rem;
}

/* ==========================================================================
   Controls Card & Settings
   ========================================================================== */
.controls-card {
  background: var(--card-bg);
  backdrop-filter: blur(16px);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-md);
  padding: 1.5rem 1.75rem;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  animation: fadeIn 0.3s ease;
}

.settings-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 2rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  padding-bottom: 1.25rem;
}

.setting-group {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  flex: 1;
  min-width: 200px;
}

.setting-group label {
  font-size: 0.875rem;
  color: var(--text-muted);
  font-weight: 500;
}

.setting-group strong {
  color: var(--primary);
  font-weight: 700;
}

/* Select sur mesure */
.select-wrapper {
  position: relative;
  display: flex;
  align-items: center;
}

.custom-select {
  width: 100%;
  appearance: none;
  -webkit-appearance: none;
  background: rgba(30, 41, 59, 0.8);
  color: var(--text-main);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: var(--radius-sm);
  padding: 0.6rem 2.2rem 0.6rem 0.9rem;
  font-family: inherit;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  outline: none;
  transition: var(--transition-fast);
}

.custom-select:hover, .custom-select:focus {
  border-color: var(--primary);
  background: rgba(40, 53, 76, 0.9);
}

.select-arrow {
  position: absolute;
  right: 0.8rem;
  pointer-events: none;
  color: var(--text-muted);
}

/* Slider de qualité */
.slider-wrapper {
  display: flex;
  align-items: center;
}

input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 6px;
  border-radius: 3px;
  background: #334155;
  outline: none;
  cursor: pointer;
}

input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--primary);
  box-shadow: 0 0 10px var(--primary-glow);
  cursor: pointer;
  transition: transform 0.1s ease;
}

input[type="range"]::-webkit-slider-thumb:hover {
  transform: scale(1.2);
}

.setting-group.disabled {
  opacity: 0.4;
  pointer-events: none;
}

/* Color Picker */
.color-picker-wrapper {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.custom-color-input {
  -webkit-appearance: none;
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 6px;
  width: 36px;
  height: 36px;
  cursor: pointer;
  background: transparent;
  padding: 2px;
}

.custom-color-input::-webkit-color-swatch-wrapper {
  padding: 0;
}

.custom-color-input::-webkit-color-swatch {
  border: none;
  border-radius: 4px;
}

#bgColorHex {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-muted);
  font-family: monospace;
}

.actions-group {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  justify-content: flex-end;
}

/* Boutons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.65rem 1.2rem;
  font-family: inherit;
  font-size: 0.9rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  border: none;
  cursor: pointer;
  transition: var(--transition-normal);
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
  color: #fff;
  box-shadow: 0 4px 15px var(--primary-glow);
}

.btn-primary:hover {
  opacity: 0.92;
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(99, 102, 241, 0.45);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.07);
  color: var(--text-main);
  border: 1px solid var(--card-border);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: rgba(255, 255, 255, 0.2);
}

.btn-danger {
  background: rgba(239, 68, 68, 0.12);
  color: #fca5a5;
  border: 1px solid rgba(239, 68, 68, 0.25);
}

.btn-danger:hover {
  background: var(--danger);
  color: #fff;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none !important;
}

/* ==========================================================================
   Image Grid & Cards
   ========================================================================== */
.image-list-section {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.list-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0 0.5rem;
}

.list-header h2 {
  font-size: 1.15rem;
  font-weight: 600;
}

.status-summary {
  font-size: 0.85rem;
  color: var(--text-muted);
  background: rgba(255, 255, 255, 0.05);
  padding: 0.25rem 0.75rem;
  border-radius: 20px;
}

.image-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(290px, 1fr));
  gap: 1rem;
}

/* Card d'image */
.image-card {
  background: var(--card-bg);
  backdrop-filter: blur(12px);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-md);
  padding: 0.9rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  position: relative;
  transition: var(--transition-normal);
  animation: slideUp 0.3s ease;
}

.image-card:hover {
  border-color: var(--card-border-hover);
  transform: translateY(-2px);
}

.card-top {
  display: flex;
  gap: 0.85rem;
  align-items: center;
}

.thumb-container {
  width: 64px;
  height: 64px;
  border-radius: var(--radius-sm);
  overflow: hidden;
  background: #000;
  flex-shrink: 0;
  position: relative;
  border: 1px solid rgba(255, 255, 255, 0.1);
  background-image: linear-gradient(45deg, #1e293b 25%, transparent 25%), 
                    linear-gradient(-45deg, #1e293b 25%, transparent 25%), 
                    linear-gradient(45deg, transparent 75%, #1e293b 75%), 
                    linear-gradient(-45deg, transparent 75%, #1e293b 75%);
  background-size: 12px 12px;
  background-position: 0 0, 0 6px, 6px -6px, -6px 0px;
}

.thumb-container img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.image-info {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  overflow: hidden;
  flex: 1;
}

.file-name {
  font-size: 0.875rem;
  font-weight: 600;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.format-tags {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.75rem;
  font-weight: 700;
}

.tag-orig {
  color: #94a3b8;
  background: rgba(255, 255, 255, 0.08);
  padding: 0.1rem 0.35rem;
  border-radius: 4px;
  text-transform: uppercase;
}

.tag-arrow {
  color: var(--primary);
}

.tag-target {
  color: #a5b4fc;
  background: rgba(99, 102, 241, 0.2);
  padding: 0.1rem 0.35rem;
  border-radius: 4px;
  text-transform: uppercase;
}

.file-stats {
  font-size: 0.775rem;
  color: var(--text-muted);
  display: flex;
  gap: 0.5rem;
  align-items: center;
}

.badge-status {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  font-size: 0.725rem;
  font-weight: 600;
  padding: 0.15rem 0.45rem;
  border-radius: 4px;
  width: fit-content;
}

.badge-pending {
  background: rgba(234, 179, 8, 0.15);
  color: #fde047;
}

.badge-converting {
  background: rgba(99, 102, 241, 0.15);
  color: #a5b4fc;
}

.badge-done {
  background: rgba(16, 185, 129, 0.15);
  color: #6ee7b7;
}

.badge-error {
  background: rgba(239, 68, 68, 0.15);
  color: #fca5a5;
}

.card-actions {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  padding-top: 0.6rem;
  margin-top: 0.1rem;
}

.btn-icon {
  background: transparent;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 0.35rem;
  border-radius: 6px;
  transition: var(--transition-fast);
  display: flex;
  align-items: center;
  justify-content: center;
}

.btn-icon:hover {
  color: var(--danger);
  background: rgba(239, 68, 68, 0.1);
}

.btn-download-single {
  font-size: 0.8rem;
  padding: 0.35rem 0.75rem;
  border-radius: 6px;
  background: rgba(99, 102, 241, 0.15);
  color: #a5b4fc;
  border: 1px solid rgba(99, 102, 241, 0.3);
  cursor: pointer;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  transition: var(--transition-fast);
}

.btn-download-single:hover {
  background: var(--primary);
  color: #fff;
}

.btn-download-single:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

/* Helpers */
.hidden {
  display: none !important;
}

/* Animations */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(-5px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes slideUp {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Footer */
.app-footer {
  padding: 1.5rem;
  text-align: center;
  font-size: 0.8rem;
  color: var(--text-dim);
}

/* Responsive */
@media (max-width: 640px) {
  h1 { font-size: 1.85rem; }
  .drop-zone { padding: 2.5rem 1rem; }
  .settings-row { flex-direction: column; align-items: stretch; gap: 1rem; }
  .controls-card { flex-direction: column; align-items: stretch; }
  .actions-group { flex-direction: column; }
  .actions-group .btn { width: 100%; justify-content: center; }
}